JP6053924B2 - Vehicle wheel - Google Patents

Description

  The present invention relates to a vehicle wheel.

Conventionally, as a wheel for reducing road noise caused by air column resonance in the tire air chamber, the auxiliary air chamber member functioning as a Helmholtz resonator in the tire air chamber has been disclosed by the applicant of the present application. The one fixed to is known (for example, see Patent Document 1).
The wheel extends in the circumferential direction on a first vertical wall surface formed to extend in the circumferential direction of the outer circumferential surface on a vertical wall standing on the outer circumferential surface of the well portion, and on one rising portion of the well portion. A first vertical wall surface and a second vertical wall surface facing each other in the width direction of the outer peripheral surface. A groove extending in the circumferential direction is formed in each of the first vertical wall surface and the second vertical wall surface, and the auxiliary air chamber member is fitted between the first vertical wall surface and the second vertical wall surface. It is out.

Further, the sub air chamber member includes a resin main body portion including a sub air chamber and a communication hole that communicates the sub air chamber with the tire air chamber. The auxiliary air chamber member extends from the main body portion toward the first vertical wall surface and is formed to extend in the circumferential direction, and is engaged with the groove portion of the first vertical wall surface. With an edge. The auxiliary air chamber member extends from the main body portion toward the second vertical wall surface and is formed to extend in the circumferential direction. The second air chamber member is locked to the groove portion of the second vertical wall surface. With an edge.
Further, the auxiliary air chamber member includes a protruding portion as a so-called detent that protrudes from the edge portion in the wheel width direction and is locked to the vertical wall surface and restricts movement of the auxiliary air chamber member in the wheel circumferential direction. Yes.

The auxiliary air chamber member of such a vehicle wheel (see, for example, Patent Document 1) is often fixed to the well portion by a predetermined pusher (pressing device).
Next, FIG. 11A to be referred to is a perspective view for explaining a mounting method for attaching the auxiliary air chamber member 110 of the conventional vehicle wheel to the well portion 11c.
As shown in FIG. 11A, in the conventional method of attaching the sub air chamber member 110, the sub air chamber member 110 is inclined so that the edge portion 114a is close to the well portion 11c, and is provided on the edge portion 114a side. The protruding portion 118 thus formed is fitted into the notch 115a of the well portion 11c. At this time, a part of the edge portion 114a in the vicinity of the protruding portion 118 is fitted into a groove portion (not shown) of the first vertical wall surface 116a.

  Next, when the pusher 60 is pressed against the edge 114b of the auxiliary air chamber member 110, the entire edge 114a is fitted into the groove of the first vertical wall surface 116a, and the entire edge 114b is second. Is fitted into a groove (not shown) of the vertical wall surface 116b. As a result, the auxiliary air chamber member 110 is fixed to the first and second vertical wall surfaces 116a and 116b of the well portion 11c.

By the way, the auxiliary air chamber member of the conventional vehicle wheel (for example, refer to Patent Document 1) is made of resin from the viewpoint of reducing the weight, reducing the manufacturing cost, ensuring the airtightness of the auxiliary air chamber formed inside, and the like. Blow molded products are desirable.
However, the blow-molded sub air chamber member has a so-called biting burr remaining in the molding portion in the cutting process at the biting portion that separates the molded portion and the unnecessary resin portion.

  In particular, the biting burrs remaining at the tips of the edge portions 114a and 114b are rubbed into the thread form on the first and second vertical wall surfaces 116a and 116b in the attachment process shown in FIG. Detach. If the detached thread-like biting burr is sandwiched between the tire bead and the wheel bead sheet, there is a possibility of causing a tire air slow leak. Moreover, if the detached biting burr enters the pipe body 118, the sound deadening performance may be deteriorated.

Therefore, it is desirable to shape the edges 114a and 114b of the blow-molded auxiliary air chamber member when commercialized.
FIG. 11B is a schematic diagram showing the tip of the shaped edge 114a, and is a schematic view of the edge 114a of FIG. In FIG. 11B, reference numeral 125a is an upper plate constituting the auxiliary air chamber member 110, and reference numeral 125b is a bottom plate.
As shown in FIG. 11 (b), the tip of the edge 114a is partly cut off with the cutting line 115 as a part of the tip including the bite burr 117 during shaping. By this shaping, a contact surface against the vertical wall surface 116a without the bite burr 117 is formed at the tip of the edge portion 114a.
That is, a slow leak of the tire air pressure due to the detached thread-like biting burr 117 is reliably avoided.

Japanese Patent No. 4551422 (FIG. 9B, etc.)

However, the auxiliary air chamber member 110 of the conventional vehicle wheel (see, for example, Patent Document 1), as described above, has the protruding portion 118 protruding from the edge portion 114a in the wheel width direction. Moreover, the shaping process of the edge 114a becomes complicated.
FIG. 11C is an explanatory diagram of a shaping process for the edge portions 114 a and 114 b of the conventional auxiliary air chamber member 110.
As shown in FIG. 11 (c), the shaping step for the edge 114b can cut the bite burr 117 (see FIG. 11 (b)) in a single step performed at a stroke in the direction of the arrow 115a, for example. .
On the other hand, in the shaping process for the edge portion 114a, it is necessary to perform one process indicated by the arrow 115b with the protrusion 118 interposed therebetween, and then perform the second process indicated by the arrow 115c. In other words, in a conventional vehicle wheel (see, for example, Patent Document 1), in order to reshape the edge portion 114a having the protruding portion 118, the bite burr 117 (FIG. 11B) is used unless at least two steps are performed. There is a problem that cannot remove all of (see). The shaping device that performs this shaping step needs to perform the shaping step shown by the arrow 115a and the shaping step divided into two stages of the arrow 115b and the arrow 115c, so that the configuration of the shaping device itself is complicated. There are also issues to be solved.

  Then, the subject of this invention is providing the wheel for vehicles provided with the auxiliary air chamber member which can simplify the structure of the shaping process of an edge part, and the edge shaping apparatus.

The present invention that has solved the above problems is a vehicle wheel having a sub air chamber member as a Helmholtz resonator on the outer peripheral surface of a well portion in a tire air chamber, and is a vertical wall that is erected on the outer peripheral surface of the well portion in a first vertical wall surface that is formed so as to extend in a circumferential direction of the outer peripheral surface, it is formed so as to extend in the circumferential direction on one of the rising portion of the well portion, of the outer peripheral surface and the first vertical wall surface A second vertical wall surface facing in the width direction, and a groove portion extending in the circumferential direction is formed in each of the first vertical wall surface and the second vertical wall surface, and the auxiliary air chamber member includes the first vertical wall surface A resin-made main body portion that is fitted between the wall surface and the second vertical wall surface, and that includes a sub air chamber, and a communication hole that communicates the sub air chamber with the tire air chamber; 1 is formed so as to extend toward the vertical wall surface of 1 and to extend in the circumferential direction, A first edge which is engaged with the groove portion of the first vertical wall surface,
A second edge extending from the main body portion toward the second vertical wall surface and extending in the circumferential direction and locked to the groove portion of the second vertical wall surface; and a first edge parts and the one or both towards either et protrusion protruding in the wheel radial direction of the second edge, wherein the protruding portion includes a first vertical corresponding to the edge where the protruding portion is formed Locked to one or both of the wall surface and the second vertical wall surface, the movement of the auxiliary air chamber member in the circumferential direction is restricted, and the outer end portion of the protruding portion in the width direction has the protruding portion. outer end and the same position in the width direction of the edge to be formed, or than the outer end portion in the width direction of the edge and being located on the inside of the width direction.

  According to this vehicle wheel, since the protruding portion is located at the same position as the edge portion or on the inner side of the edge portion, the shaping for removing the biting burr at the edge portion where the protruding portion is formed is performed. When performing, similarly to the edge part in which the protrusion part is not formed, shaping can be performed at a stretch from one end to the other end in the circumferential direction of the edge part. That is, according to this vehicle wheel, the edge shaping step can be carried out without being interfered with by the protruding portion as a detent formed at the edge of the auxiliary air chamber member.

  In this vehicle wheel, a pair of auxiliary air chamber members may be arranged so as to face each other across the wheel rotation center.

  According to such a vehicle wheel, since the wheel unbalance (static balance) generated by one of the pair of auxiliary air chamber members is canceled by the wheel unbalance (static balance) generated by the other, A counterweight for facing the air chamber member becomes unnecessary.

  In this vehicle wheel, the communication hole is formed inside a tubular body that is biased and arranged on one side edge in the wheel width direction of the secondary air chamber member, and the tubular body is formed by the secondary air chamber. It can also be set as the structure extended along the wheel circumferential direction in the edge part of the wheel circumferential direction of a member.

  In such a vehicle wheel, the tubular body is provided so as to be biased to the edge side that is locked to the first vertical wall surface and the second vertical wall surface and is strongly restrained by these vertical wall surfaces. As a result, this vehicle wheel more effectively prevents deformation of the auxiliary air chamber member when centrifugal force is applied to the tube body, compared to the case where the tube body is disposed at the center portion in the width direction of the main body portion. To do.

  In this vehicle wheel, the main body portion forms the auxiliary air chamber by curving so as to have a bulge above the bottom plate and the bottom plate arranged along the outer peripheral surface side of the well portion. And the communication hole is formed to be separated from the auxiliary air chamber in the wheel width direction by a joint portion joined so that the upper plate and the bottom plate are partially integrated. It can also be set as the structure made.

  According to such a vehicle wheel, the auxiliary air chamber and the communication hole communicating with the auxiliary air chamber can be provided with a simple structure as compared with the case where the tube body is separately joined to the main body portion and the communication hole communicating with the auxiliary air chamber is provided. Can be formed.

  In this vehicle wheel, the coupling portion may be formed of a bent plate.

  According to such a vehicle wheel, since the rigidity of the coupling portion can be increased, deformation of the auxiliary air chamber member when centrifugal force is applied is more effectively prevented.

  In this vehicle wheel, the auxiliary air chamber member is formed integrally with two Helmholtz resonators in the circumferential direction of the wheel with a partition wall as a boundary, and the communication holes are at both ends of the auxiliary air chamber member in the circumferential direction of the wheel. It can also be set as the structure currently formed inside the pipe formed in each part.

  According to such a vehicle wheel, since two Helmholtz resonators can be formed by one sub air chamber member, the configuration of the vehicle wheel itself is simplified. Further, according to this vehicle wheel, since two Helmholtz resonators can be formed by one auxiliary air chamber member, the edge portion can be compared with the case where two Helmholtz resonators are formed by two auxiliary air chamber members. It is possible to reduce the shaping process for removing the burrs.

  ADVANTAGE OF THE INVENTION According to this invention, the wheel for vehicles provided with the sub air chamber member which can simplify the structure of the shaping process of an edge part and the shaping apparatus of an edge part can be provided.

1 is a perspective view of a vehicle wheel according to an embodiment of the present invention. It is a whole perspective view of a sub air chamber member. (A) is a top view of the sub air chamber member seen from the convex side of FIG. 2, (b) is a bottom view of the sub air chamber member seen from the concave side of FIG. It is a perspective view which shows the sub air chamber member notched by the IV-IV line of FIG. It is VV sectional drawing of FIG. FIG. 4 is a cross-sectional view taken along the line VI-VI in FIG. 1 and includes a cross-section taken along the line VI-VI of the auxiliary air chamber member in FIG. (A) is a partial expansion perspective view of the vicinity of the protrusion of the auxiliary air chamber member and the vicinity of the notch formed in the vertical wall of the well, and (b) shows the protrusion fitted into the notch. It is a partial expansion perspective view. (A) is a schematic diagram which shows a mode that the sub air chamber member is arrange | positioned on a well part in the vehicle wheel which concerns on embodiment of this invention, (b) is sub-vehicle in the vehicle wheel which concerns on other embodiment. It is a schematic diagram which shows a mode that the air chamber member is arrange | positioned on a well part. (A) And (b) is process explanatory drawing explaining the attachment method of the sub air chamber member with respect to the well part of a rim | limb. (A) is a partial enlarged perspective view of the vicinity of the protruding portion of the auxiliary air chamber member and the vicinity of the notch formed in the vertical wall of the well portion in the vehicle wheel according to another embodiment. It is a partial expansion perspective view which shows the protrusion part engage | inserted by the notch part, (c) is a front view which shows the protrusion part engage | inserted by the notch part. (A) is a perspective view explaining the attachment method which attaches the sub air chamber member of the conventional vehicle wheel to a well part, (b) is a schematic diagram which shows the front-end | tip part of the shaped edge, (c) These are explanatory drawings of the shaping process with respect to the edge part of the conventional sub air chamber member.

The vehicle wheel according to the present invention has a secondary air chamber member (helmholtz resonator) that silences road noise caused by air column resonance in the tire air chamber on the outer peripheral surface of the well portion.
Below, after demonstrating the whole structure of the wheel for vehicles, a sub air chamber member is demonstrated in detail.

FIG. 1 is a perspective view of a vehicle wheel 100 according to an embodiment of the present invention.
As shown in FIG. 1, the vehicle wheel 100 includes a rim 11 and a disk 12 for connecting the rim 11 to a hub (not shown).
The rim 11 is a well portion that is recessed toward the inner side in the wheel radial direction (rotation center side) between tire bead seat portions (not shown) formed at both ends in the wheel width direction Y shown in FIG. 11c.

  The well portion 11c is provided to drop a bead portion (not shown) of the tire when assembling a tire (not shown) to the rim 11. Incidentally, the well portion 11c in the present embodiment is formed in a cylindrical shape having substantially the same diameter over the wheel width direction Y.

  In FIG. 1, reference numeral 11d denotes an outer peripheral surface of the well portion 11c. Reference numeral 18 denotes a tubular body in which a communication hole 20 (see FIG. 2) described later is formed, and reference numeral 15 denotes an annular vertical wall provided on the outer peripheral surface 11d of the well portion 11c so as to extend in the circumferential direction of the rim 11. It is. Incidentally, the auxiliary air chamber member 10 is locked to the vertical wall 15 as described later. Reference numeral 15 a denotes a cutout portion of the vertical wall 15 into which the protruding portion 26 of the auxiliary air chamber member 10 is fitted when the auxiliary air chamber member 10 is locked to the vertical wall 15. In FIG. 1, the symbol X is the wheel circumferential direction.

Next, the auxiliary air chamber member 10 will be described.
FIG. 2 is an overall perspective view of the auxiliary air chamber member 10.
As shown in FIG. 2, the auxiliary air chamber member 10 is a member that is long in one direction, and has a hollow main body portion 13 having an auxiliary air chamber SC (see FIG. 4) to be described later, and edge portions 14 a and 14 b. And.
The edge portion 14a corresponds to a “first edge portion” in the claims, and the edge portion 14b corresponds to a “second edge portion” in the claims.

  The auxiliary air chamber member 10 is curved in the longitudinal direction, and is arranged along the wheel circumferential direction X when attached to the outer peripheral surface 11d (see FIG. 1) of the well portion 11c (see FIG. 1). . Reference numeral 18 denotes a tubular body that constitutes a part of the main body 13, and a communication hole 20 that communicates with the auxiliary air chamber SC (see FIG. 4) is formed inside thereof. Reference numeral 26 denotes a protrusion described later provided on the edge portion 14a, and reference numeral Y denotes a wheel width direction.

Next, FIG. 3A to be referred to is a top view of the auxiliary air chamber member 10 as viewed from the convex side of FIG. 2, and FIG. 3B is a lower surface of the auxiliary air chamber member 10 as viewed from the concave side of FIG. FIG.
As shown in FIG. 3A, the auxiliary air chamber member 10 has a long rectangular shape in plan view. The planar shape of the main body 13 is a substantially rectangular shape that is slightly smaller than the planar shape of the auxiliary air chamber member 10 when the formation region of the tubular body 18 (including the formation region of the coupling portion 35 described in detail later) is combined. Yes.
The main body portion 13 in which a sub air chamber SC (see FIG. 4), which will be described later, is formed, that is, the main body portion 13 excluding the tube 18 and the coupling portion 35 is substantially omitted in a top view (plan view) in FIG. It has a hat shape (substantially convex shape).

  And the main-body-part 13 part in which the sub air chamber SC (refer FIG. 4) is formed is comprised by the substantially hat-shaped peak part and the substantially hat-shaped collar part. In other words, a full width portion 13a (corresponding to a mountain height portion) extending in the wheel circumferential direction X with the maximum width, and a bulge that is provided in parallel with the tubular body 18 in the wheel width direction Y and bulges from the full width portion 13a in the wheel circumferential direction X The main part is composed of a protruding part 13b (corresponding to the collar part).

  As shown in FIG. 3A, on the upper surface side of the main body portion 13 (the convex side of the auxiliary air chamber member 10), the main body portion 13 is crossed in the width direction (wheel width direction Y) at the center in the longitudinal direction. A groove D1 extends in the groove. As will be described later, the groove D1 is formed by recessing the upper plate 25a (see FIG. 4) of the main body 13 toward the bottom plate 25b (see FIG. 4).

Moreover, as shown in FIG.3 (b), the main-body part 13 is made into the width direction (wheel width direction Y) in the center of the longitudinal direction in the lower surface side (concave side of the sub air chamber member 10) of the main-body part 13. As shown in FIG. A groove D2 extends so as to cross. As will be described later, the groove D2 is formed by recessing the bottom plate 25b (see FIG. 4) of the main body 13 toward the upper plate 25a (see FIG. 4).
Incidentally, the groove D1 and the groove D2 constitute a partition wall W (see FIG. 4) described later by partially connecting the upper plate 25a and the bottom plate 25b, and the partition wall W is a hollow of the main body 13. By dividing the portion into two, a pair of auxiliary air chambers SC (see FIG. 4) to be described later is formed in the main body portion 13.

  As shown in FIG. 3A, each of the pair of tubular bodies 18 is at both ends in the longitudinal direction (wheel circumferential direction X) of the auxiliary air chamber member 10 and in the short direction of the auxiliary air chamber member 10 ( It is biased and arranged on one side edge in the wheel width direction Y). Specifically, the tubular body 18 in the present embodiment is disposed closer to one edge portion 14b side of the two edge portions 14a and 14b.

  The tubular body 18 extends along the longitudinal direction of the auxiliary air chamber member 10 (the wheel circumferential direction X). And each of the communicating hole 20 (refer FIG.3 (b)) formed in a pair of pipe body 18 is connecting the pair of sub air chamber SC (refer FIG. 4) separately with the exterior. That is, the auxiliary air chamber member 10 has a structure in which two Helmholtz resonators 19a and 19b are integrally formed with the groove D1 and the groove D2 as a boundary.

Each of the edge portions 14 a and 14 b extends from the main body portion 13 toward the short direction (wheel width direction Y) of the auxiliary air chamber member 10. These edge portions 14a and 14b lock the auxiliary air chamber member 10 to the well portion 11c (see FIG. 1). The edges 14a and 14b will be described in detail later.
In FIG. 3A, reference numeral 26 denotes a protrusion which will be described in detail later. Reference numeral 33a denotes an upper coupling portion. In FIG. 3B, reference numeral 30 denotes a bead, and reference numeral 33b denotes a lower coupling portion. The upper coupling portion 33a, the bead 30, and the lower coupling portion 33b will be described with reference to FIGS.

FIG. 4 is a perspective view showing the auxiliary air chamber member 10 cut out along the line IV-IV in FIG. 3. 5 is a cross-sectional view taken along the line VV in FIG.
As shown in FIGS. 4 and 5, the main body 13 of the sub air chamber member 10 includes a bottom plate 25 b and an upper plate 25 a that forms a sub air chamber SC between the bottom plate 25 b. In addition, although each of the resin material which comprises the upper board 25a and the bottom board 25b in this embodiment is the same thickness, these thicknesses may mutually differ.

The upper plate 25a is curved so as to bulge above the bottom plate 25b arranged along the outer peripheral surface 11d side of the well portion 11c, thereby forming a sub air chamber SC.
Incidentally, the communication hole 20 of the tubular body 18 extending in the wheel circumferential direction X communicates with the auxiliary air chamber SC at one end side in the wheel circumferential direction X and opens to the outside at the other end side, as shown in FIG. ing.

  The volume of each auxiliary air chamber SC, SC is preferably about 50 to 250 cc. By setting the volume of the auxiliary air chamber SC within this range, each of the Helmholtz resonators 19a and 19b exhibits a silencing effect sufficiently, while suppressing an increase in its weight and reducing the weight of the vehicle wheel 100. Can be planned. Further, the length of the auxiliary air chamber member 10 in the wheel circumferential direction X is set to a maximum of one half of the circumferential length of the rim 11 (see FIG. 1) (the circumferential length of the outer peripheral surface 11d of the well portion 11c). The weight can be appropriately set in consideration of the adjustment of the weight of the vehicle wheel 100 and the ease of assembly to the well portion 11c.

The communication hole 20 allows the tire air chamber MC (see FIG. 6) to be formed between the tire 11 (see FIG. 1) and the tire (not shown) and the auxiliary air chamber SC on the well portion 11c (see FIG. 1). .
The cross-sectional shape of the communication hole 20 is not particularly limited, and may be any of an elliptical shape, a circular shape, a polygonal shape, a D shape, and the like. The diameter of the communication hole 20 is desirably 5 mm or more when the cross section is circular. In addition, the communication hole 20 having a cross-sectional shape other than a circle preferably has a diameter of 5 mm or more when converted into a circle having the same cross-sectional area.

  The length of the communication hole 20 is set so as to satisfy the equation for obtaining the resonant vibration frequency of the Helmholtz resonator represented by the following (Equation 1).

f ₀ = C / 2π × √ (S / V (L + α × √S)) (Expression 1)
f ₀ (Hz): resonance vibration frequency C (m / s): sound velocity inside the sub-air chamber SC (= sound velocity inside the tire air chamber MC)
V (m ³ ): Volume of the auxiliary air chamber SC L (m): Length of the communication hole 20 S (m ² ): Cross-sectional area of the opening of the communication hole 20 α: Correction coefficient The resonance vibration frequency f ₀ is The resonance vibration frequency of the tire air chamber MC is adjusted.

  As shown in FIG. 4, the upper plate 25 a is formed with an upper coupling portion 33 a in a portion constituting the main body portion 13. The upper coupling portion 33a is formed such that the upper plate 25a is recessed toward the bottom plate 25b side, and has a circular shape in plan view. As shown in FIG. 2, the upper coupling portion 33 a is formed so as to be arranged in two rows in the width direction of the main body portion 13 along the longitudinal direction (wheel circumferential direction X) of the auxiliary air chamber member 10. Specifically, as shown in FIG. 3A, in the full width portion 13a, a total of 20 upper coupling portions 33a are formed in two rows, and in each of the bulging portions 13b, one each, a total of two upper portions A coupling portion 33a is formed.

As shown in FIG. 4, the bottom plate 25b is formed with a lower coupling portion 33b at a position corresponding to the upper coupling portion 33a.
These lower coupling portions 33b are formed such that the bottom plate 25b is recessed toward the upper plate 25a side, and have a circular shape in plan view. These lower coupling portions 33b have their distal ends integrated with the distal ends of the upper coupling portions 33a of the upper plate 25a to partially couple the upper plate 25a and the bottom plate 25b.
Incidentally, the upper coupling portion 33a and the lower coupling portion 33b coupled to each other in the auxiliary air chamber SC improve the mechanical strength of the auxiliary air chamber member 10 and suppress the fluctuation of the volume of the auxiliary air chamber SC. In this configuration, the mute function described later is more effectively exhibited.
In the present invention, such a structure that does not include the upper coupling portion 33a and the lower coupling portion 33b may be employed.

As shown in FIGS. 4 and 5, the sub air chamber member 10 has a hollow portion of the main body portion 13 divided into two sub air chambers SC by a partition wall W.
As described above, the auxiliary air chamber member 10 is configured such that the two Helmholtz resonators 19a and 19b are integrally formed with the partition wall W as a boundary.

Incidentally, as described above, the partition wall W is formed by joining the groove D1 formed on the upper plate 25a side and the groove D2 formed on the bottom plate 25b side. The partition wall W divides the hollow portion of the main body portion 13 into two to form a pair of sub air chambers SC.
The partition wall W only needs to partition the hollow portion of the main body 13 to form two auxiliary air chambers SC. For example, the upper and lower plates 25a and 25b are formed only by the groove D1 without forming the groove D2. It may be formed by bonding. The partition wall W may be formed by joining the upper plate 25a and the bottom plate 25b only by the groove D2 without forming the groove D1.

Next, the coupling portion 35 formed between the bulging portion 13b of the main body portion 13 and the tubular body 18 will be described.
As shown in FIGS. 4 and 5, the coupling portion 35 is formed by joining the bulging portion 13b and the tubular body 18 so that the upper plate 25a and the bottom plate 25b are partially integrated. It is.
Specifically, as shown in FIG. 5, the coupling portion 35 is formed by joining the upper plate 25 a and the bottom plate 25 b at the end portion in the wheel circumferential direction X of the full width portion 13 a of the main body portion 13. An end 35a is formed. Further, the coupling portion 35 is formed of a bent plate body that forms a bent portion that protrudes outward in the wheel radial direction Z while extending in the wheel circumferential direction X from the base end 35a. Incidentally, the base end 35a and the front end 35b of the coupling portion 35 in the present embodiment are formed at the same height as the bottom plate 25b (on the same curved surface in the wheel circumferential direction X).

  As shown in FIG. 5, the bead 30 (see FIG. 3B) has a bottom plate 25 b that is partially recessed toward the upper plate 25 a side. As shown in FIG. 3B, the bead 30 in the present embodiment extends in the width direction of the auxiliary air chamber member 10 (the wheel width direction Y) at the position where the lower coupling portion 33b is formed. That is, the bead 30 increases the surface rigidity of the bottom plate 25b (see FIG. 5) by joining to the lower coupling portion 33b.

Next, the attachment aspect of the sub air chamber member 10 with respect to the well part 11c (refer FIG. 1) is demonstrated. 6 is a cross-sectional view taken along the line VI-VI in FIG. 1 and includes a cross-sectional view taken along the line VI-VI of the auxiliary air chamber member 10 shown in FIG.
As shown in FIG. 6, the edge portion 14 a and the edge portion 14 b are formed so as to extend in the wheel width direction Y from the main body portion 13 formed by the upper plate 25 a and the bottom plate 25 b as described above. And the edge part 14a is extended toward the 1st vertical wall surface 16a from the main-body part 13, and the front-end | tip is fitted in the groove part 17a of the 1st vertical wall surface 16a. Moreover, the edge part 14b is extended toward the 2nd vertical wall surface 16b from the main-body part 13, and the front-end | tip is fitted in the groove part 17b of the 2nd vertical wall surface 16b.

  Incidentally, the 1st vertical wall surface 16a is prescribed | regulated by the side surface inside the wheel width direction Y of the vertical wall 15 (left side of the paper surface of FIG. 6). The second vertical wall surface 16b is defined by a side surface portion (rising portion) 11e of the well portion 11c facing the first vertical wall surface 16a. The groove portions 17a and 17b are formed along the circumferential direction of the outer peripheral surface 11d of the well portion 11c to form an annular circumferential groove. In the present embodiment, the vertical wall 15 and the side surface portion 11e are formed integrally with the well portion 11c when the rim 11 (see FIG. 1) is cast, and the groove portions 17a and 17b are respectively formed on the vertical wall 15 and the side surface portion 11e. It is formed by machining.

  And in this embodiment, the length L2 of one edge part 14b is shorter than the length L1 of the other edge part 14a among the edge part 14a and the edge part 14b. Here, the length L1 of the edge portion 14a is equal to the distance from the outer end of the main body portion 13 on the first vertical wall surface 16a side to the bottom of the groove portion 17a. In this embodiment, the length L1 is the first distance from the outer end of the main body portion 13. It is equal to the distance to the vertical wall surface 16a. Further, the length L2 of the edge portion 14b is equal to the distance from the outer end of the main body portion 13 on the second vertical wall surface 16b side to the bottom of the groove portion 17b. It is equal to the distance to the vertical wall surface 16b.

The edge portion 14a and the edge portion 14b extending toward the first vertical wall surface 16a and the second vertical wall surface 16b are integrated with the curved bottom plate 25b and protrude toward the outer peripheral surface 11d side of the well portion 11c. A curved surface is formed. And these edge parts 14a and 14b have spring elasticity by selecting the thickness and material suitably.
In FIG. 6, symbol SC is a sub air chamber, and symbol MC is a tire air chamber formed between a tire (not shown) and the well portion 11c. Reference numeral 26 denotes a protrusion that is fitted into the notch 15 a of the vertical wall 15.
Incidentally, the outer end portion in the wheel width direction Y of the protruding portion 26 in the present embodiment is in the same position as the outer end portion in the wheel width direction Y of the edge portion 14a on which the protruding portion 26 is formed. .

Next, FIG. 7A to be referred to is a partially enlarged perspective view of the vicinity of the protruding portion 26 of the auxiliary air chamber member 10 and the vicinity of the cutout portion 15a formed in the vertical wall 15 of the well portion 11c. ) Is a partially enlarged perspective view showing the protrusion 26 fitted in the notch 15a.
As shown in FIG. 7 (a), the protruding portion 26 is formed at a distal end of the edge portion 14a of the auxiliary air chamber member 10 so as to protrude outward in the wheel radial direction Z (above the arrow Z) ( A rectangular parallelepiped that is long in the wheel circumferential direction X). The width of the protrusion 26 in the circumferential direction X of the wheel is such that it can be accommodated in a notch 15 a formed in the vertical wall 15.

Further, as shown in FIG. 7B, the protruding height of the protruding portion 26 protrudes into the inner upper portion 15b of the notched portion 15a when the tip of the edge portion 14a is fitted into the groove portion 17a of the vertical wall 15. The height is set such that the portion 26 can come into contact therewith.
Thereby, when the auxiliary air chamber member 10 is locked to the vertical wall 15 via the edge portion 14a, the protruding portion 26 is fitted into the cutout portion 15a of the vertical wall 15 so that the auxiliary air chamber member 10 is fitted. Functions as a detent in the wheel circumferential direction X.

  The sub air chamber member 10 according to the present embodiment as described above is assumed to be a resin molded product. In the case of a resin, a lightweight and highly rigid resin that can be blow-molded is desirable in view of weight reduction, improvement in mass productivity, reduction in manufacturing cost, securing airtightness of the sub air chamber SC, and the like. Among these, polypropylene that is resistant to repeated bending fatigue is particularly desirable.

Next, the position of the auxiliary air chamber member 10 in the vehicle wheel 100 of the present embodiment will be described.
FIG. 8A is a schematic view showing a state in which the auxiliary air chamber member 10 is disposed on the well portion 11c in the vehicle wheel 100 according to the embodiment of the present invention, and FIG. 8B is related to another embodiment. FIG. 6 is a schematic view showing a state in which the auxiliary air chamber member 10 is disposed on the well portion 11c in the vehicle wheel 100.

As shown in FIG. 8A, the vehicle wheel 100 according to the present embodiment has a configuration in which the two Helmholtz resonators 19a and 19b are integrally formed as described above, and the Helmholtz resonator 19a The communication hole 20a and the communication hole 20b of the Helmholtz resonator 19b are provided apart from each other in the circumferential direction at an angle of 90 ° around the wheel rotation center Ax.
Reference numeral B denotes a counterweight that cancels a wheel unbalance (static balance) caused by attaching the auxiliary air chamber member 10 to the well portion 11c.

  According to such a vehicle wheel 100, the communication holes 20a and 20b are provided apart from each other in the circumferential direction at an angle of 90 ° around the wheel rotation center Ax, thereby preventing the occurrence of so-called noise reduction unevenness. be able to.

  Further, as shown in FIG. 8B, in the vehicle wheel 100 according to another embodiment, the first auxiliary air chamber member 10a and the second auxiliary air chamber member 10b sandwich the wheel rotation center Ax. It is attached to the well part 11c so as to face each other. Incidentally, the first sub air chamber member 10 a and the second sub air chamber member 10 b have the same structure as the sub air chamber member 10.

  The communication holes 20a and 20b of the two Helmholtz resonators 19a and 19b of the first auxiliary air chamber member 10a, and the communication holes 20c and 20d of the two Helmholtz resonators 19c and 19d of the second auxiliary air chamber member 10b. Are provided apart from each other in the circumferential direction at an angle of 90 ° around the wheel rotation center Ax.

  According to the vehicle wheel 100 according to such another embodiment, it is possible to prevent the occurrence of noise reduction unevenness and one of the first sub air chamber member 10a and the second sub air chamber member 10b. Since the wheel unbalance (static balance) caused by the above is canceled out by the wheel unbalance (static balance) caused by the other, the counterweight B for making it face the auxiliary air chamber member 10 when the wheel balance is corrected becomes unnecessary.

Next, a method for attaching the auxiliary air chamber member 10 to the well portion 11c will be described. FIGS. 9A and 9B are process explanatory views for explaining a method of attaching the auxiliary air chamber member 10 to the well portion 11c.
In the present embodiment, the auxiliary air chamber member 10 is attached to the well portion 11c, as shown in FIGS. 9A and 9B, the edge portion 14a is positioned on the outer peripheral surface of the well portion 11c near the groove portion 17a. It is assumed that a pusher (pressing device) 60 that presses toward 11d is used.

As this pusher 60, what presses the edge part 14a (refer FIG. 9 (a) and (b)) with the air pressure of an air cylinder is mentioned, for example.
In FIGS. 9A and 9B, the pusher 60 is indicated by a virtual line (two-dot chain line) for convenience of drawing.

  As the pusher 60 used in the present embodiment, for example, a plate-like member having an edge portion having an arc-shaped contour following the curvature of the auxiliary air chamber member 10 in the longitudinal direction (the wheel circumferential direction X in FIG. 2). Although the pusher 60 applicable to this invention is mentioned, it is not limited to this, A design change can be carried out suitably.

In this attachment method, as shown in FIG. 9A, first, the auxiliary air chamber member 10 is inclined, and the short edge portion 14b is partially fitted into the groove portion 17b.
In FIG. 9A, a pusher 60 indicated by a virtual line is applied to the long edge portion 14a. Reference numeral 11d denotes an outer peripheral surface of the well portion 11c.

Next, as shown in FIG. 9B, when the pusher 60 presses the edge portion 14a toward the outer peripheral surface 11d of the well portion 11c, the auxiliary air chamber member 10 is inclined with respect to the outer peripheral surface 11d of the well portion 11c. As the height decreases, the edge 14b gradually fits into the groove 17b.
At this time, the long edge portion 14 a having spring elasticity is bent according to the pressing force of the pusher 60.

  Further, when the pusher 60 presses the edge portion 14a toward the outer peripheral surface 11d of the well portion 11c, the edge portion 14a is fitted into the groove portion 17a formed on the first vertical wall surface 16a as shown in FIG. At this time, the protrusion 26 fits into the notch 15a (see FIG. 7B) of the vertical wall 15. The auxiliary air chamber member 10 is attached to the well portion 11c by completely fitting the edge portion 14a and the edge portion 14b into the groove portion 17a and the groove portion 17b, respectively.

Next, the effect which the vehicle wheel 100 of this embodiment show | plays is demonstrated.
According to the vehicle wheel 100, as shown in FIG. 6, the outer end of the protrusion 26 in the wheel width direction Y is the outer end of the edge 14 a where the protrusion 26 is formed in the wheel width direction Y. It is in the same position as the end.
That is, as shown in FIG. 3A, the outer end of the edge portion 14 a and the outer end of the protruding portion 26 are aligned in a straight line when the auxiliary air chamber member 10 is viewed from above. Therefore, according to the vehicle wheel 100, even when shaping for removing the biting burr (see reference numeral 117 in FIG. 11B) of the edge portion 14a where the protruding portion 26 is formed, the protruding portion. Similarly to the edge portion 14b in which 26 is not formed, shaping can be performed at a stretch from one end to the other end in the wheel circumferential direction X of the edge portion 14a. Therefore, according to the vehicle wheel 100, the shaping step of the edge portion 14a can be performed without being interfered with the protruding portion 26 as a rotation stopper formed on the edge portion 14a of the auxiliary air chamber member 10.
According to the vehicle wheel 100 of this embodiment, the shaping process of the edge portion 14a of the auxiliary air chamber member 10 and the configuration of the shaping device of the edge portion 14a can be simplified.

  The communication hole 20 of the vehicle wheel 100 is formed on the inner side of the tubular body 18 that is biased and arranged on one side edge in the wheel width direction Y of the auxiliary air chamber member 10. Further, the tubular body 18 extends along the wheel circumferential direction X at the end of the auxiliary air chamber member 10 in the wheel circumferential direction X.

  In such a vehicle wheel 100, the tubular body is engaged with the first vertical wall surface 16a and the second vertical wall surface 16b so as to be biased toward the edge side strongly restrained by the vertical wall surfaces 16a and 16b. 18 is provided. As a result, the vehicle wheel 100 has the auxiliary air chamber member 10 when the centrifugal force is applied to the tubular body 18 as compared with the case where the tubular body 18 is disposed at the center portion in the wheel width direction Y of the main body portion 13. Prevent deformation more effectively.

  In the vehicle wheel 100, the main body portion 13 is curved so as to have a bottom plate 25b disposed along the outer peripheral surface 11d side of the well portion 11c and a bulge above the bottom plate 25b. And an upper plate 25a forming the SC. Further, the communication hole 20 is formed to be separated from the auxiliary air chamber SC in the wheel width direction Y by a coupling portion 35 joined so that the upper plate 25a and the bottom plate 25b are partially integrated.

  According to such a vehicle wheel 100, the sub air chamber SC and this can be configured with a simpler structure than the case where the tube body 18 is separately joined to the main body 13 and the communication hole 20 communicating with the sub air chamber SC is provided. A communication hole 20 can be formed which communicates with.

  In the vehicle wheel 100, the coupling portion 35 is formed of a bent plate.

  According to such a vehicle wheel 100, the rigidity of the coupling portion 35 can be increased, so that the deformation of the auxiliary air chamber member 10 when a centrifugal force is applied is more effectively prevented.

  In the vehicle wheel 100, the auxiliary air chamber member 10 is formed integrally with two Helmholtz resonators in the wheel circumferential direction X with the partition wall W as a boundary. Further, the communication hole 20 is formed inside the tubular body 18 formed at each end of the auxiliary air chamber member SC in the wheel circumferential direction X.

  According to such a vehicle wheel 100, two Helmholtz resonators can be formed by one sub air chamber member 10, and thus the configuration of the vehicle wheel 100 itself is simplified. Further, according to the vehicle wheel 100, two Helmholtz resonators can be formed by one sub-air chamber member 10, and therefore, compared to the case where two Helmholtz resonators are formed by two sub-air chamber members 10. The shaping process for removing the biting burrs 117 at the edges 14a, 14b can be reduced.

As mentioned above, although this embodiment was described, this invention is not limited to the said embodiment, It can implement with a various form.
In the above-described embodiment, the outer end portion of the protruding portion 26 is located at the same position as the outer end portion of the edge portion 14a on which the protruding portion 26 is formed. To (c), the projecting portion 26 may be positioned inside the edge portion 14a.
FIG. 10A is a partially enlarged perspective view of the vicinity of the protrusion 26 of the auxiliary air chamber member 10 and the vicinity of the notch 15a formed in the vertical wall 15 of the well 11c in the vehicle wheel 100 according to another embodiment. FIG. 4B is a partially enlarged perspective view showing the protruding portion 26 fitted in the notch 15a, and FIG. 4C is a front view showing the protruding portion 26 fitted in the notch 15a.
As shown in FIG. 10A, the auxiliary air chamber member 10 has an outer end portion in the wheel width direction Y of the protruding portion 26 in the wheel width direction Y of the edge portion 14a where the protruding portion 26 is formed. It is located inside the wheel width direction Y from the outer end. Specifically, the end portion of the protruding portion 26 is located on the inner side with a length L3 than the end portion of the edge portion 14a.

  Also with such a sub air chamber member 10, the step of shaping the edge portion 14a can be performed without being interfered with the protruding portion 26 as a detent formed on the edge portion 14a, as in the above embodiment. .

Moreover, in the said embodiment, it forms so that the notch part 15a (refer Fig.7 (a)) may penetrate the vertical wall 15 (refer Fig.7 (a)) to the wheel width direction Y (refer Fig.7 (a)). However, as shown in FIG. 10B, the present invention may be configured such that the notch 15 a is provided in the vertical wall 15 only in a shape corresponding to the protruding portion 26.
Since such a notch 15a does not penetrate the vertical wall 15, as shown in FIGS. 10 (b) and (c), the design in a state where the protrusion 26 is accommodated in the notch 15a is achieved. Excellent.
In addition, the notch part 15a here is provided in the vertical wall 15 in the shape corresponding to the protrusion part 26 (refer Fig.10 (a)) located inside by length L3 as mentioned above. However, in the present invention, the notch 15a is provided in the vertical wall 15 only in a shape corresponding to the protruding portion 26 (see FIG. 6) having the end located at the same position as the outer end of the edge 14a. You can also.

  In the above embodiment, the protruding portion 26 is provided on the long edge 14a. However, the present invention cuts the short edge 14b or both edges 14a and 14b. It can also be set as the structure which provides the protrusion part 26 latched by the notch part 15a.

  Moreover, in the said embodiment, although it has the structure which protrudes the protrusion part 26 to the outer side of the wheel radial direction Z, this invention can also be set as the structure which protrudes the protrusion part 26 to the inner side of the wheel radial direction Z. At this time, the cutout portion 15 a is provided in the vertical wall 15 so as to penetrate the vertical wall 15 or in a shape corresponding to the protruding portion 26.

  In the above embodiment, the auxiliary air chamber member 10 has a structure in which the two Helmholtz resonators 19a and 19b are integrally formed. However, the auxiliary air chamber member 10 included in the vehicle wheel 100 of the present invention is shown in FIG. As in the auxiliary air chamber member 110 of the conventional vehicle wheel shown in 11 (a) and 11 (c), only one Helmholtz resonator may be formed.

DESCRIPTION OF SYMBOLS 10 Sub air chamber member 10a 1st sub air chamber member 10b 2nd sub air chamber member 11c Well part 11d Outer peripheral surface 13 Main body part 13a Full width part 13b Expansion part 14a Edge (1st edge)
14b Edge (second edge)
15 vertical wall 15a cutout portion 16a first vertical wall surface 16b second vertical wall surface 17a groove portion 17b groove portion 18 tube 19a helmholtz resonator 19b helmholtz resonator 19c helmholtz resonator 19d helmholtz resonator 20a communication hole 20b communication hole 20b 20d communication hole 21 tire 21a bead part (tire bead part)
25a Top plate 25b Bottom plate 26 Protruding part 35 Coupling part 60 Pusher 100 Vehicle wheel MC Tire air chamber SC Secondary air chamber X Wheel circumferential direction Y Wheel width direction W Partition wall Z Wheel radial direction

Claims (6)

A vehicle wheel having a sub air chamber member as a Helmholtz resonator in the tire air chamber on the outer peripheral surface of the well portion,
A first vertical wall surface formed to extend in a circumferential direction of the outer peripheral surface on a vertical wall erected on the outer peripheral surface of the well portion;
A second vertical wall surface formed on one rising portion of the well portion so as to extend in the circumferential direction and facing the first vertical wall surface in the width direction of the outer peripheral surface;
With
Grooves extending in the circumferential direction are formed on each of the first vertical wall surface and the second vertical wall surface,
The auxiliary air chamber member is
Fit between the first vertical wall surface and the second vertical wall surface,
A main body made of resin, comprising: a sub air chamber; and a communication hole that communicates the sub air chamber with the tire air chamber;
A first edge portion extending from the main body portion toward the first vertical wall surface and extending in the circumferential direction, and being engaged with the groove portion of the first vertical wall surface;
A second edge portion extending from the main body portion toward the second vertical wall surface and extending in the circumferential direction and locked to the groove portion of the second vertical wall surface;
A protrusion protruding on one or both towards either et wheel radial direction among the first edge and second edge,
With
The protruding portion is locked to one or both of the first vertical wall surface and the second vertical wall surface corresponding to the edge where the protruding portion is formed, and allows the auxiliary air chamber member to move in the circumferential direction. Regulate,
The end of the outer side in the width direction of the projection, the outer end and the same position in the width direction of the edge portion to which the projecting portion is formed, or the outer end portion in the width direction of the edge The vehicle wheel, wherein the vehicle wheel is located inside the width direction. The vehicle wheel according to claim 1,
A vehicle wheel, wherein the pair of auxiliary air chamber members are arranged so as to face each other across a wheel rotation center. The vehicle wheel according to claim 1,
The communication hole is formed on the inner side of a tubular body that is biased and arranged on one side edge of the auxiliary air chamber member in the wheel width direction,
The vehicle body wheel according to claim 1, wherein the tubular body extends along a wheel circumferential direction at an end portion of the auxiliary air chamber member in the wheel circumferential direction. The vehicle wheel according to claim 1,
The main body portion is a bottom plate disposed along the outer peripheral surface side of the well portion;
An upper plate that forms the auxiliary air chamber by bending so as to have a bulge above the bottom plate;
Formed with
The communication hole is formed to be separated from the auxiliary air chamber in the wheel width direction by a coupling portion joined so that the upper plate and the bottom plate are partially integrated. Wheel. The vehicle wheel according to claim 4,
The vehicle wheel, wherein the coupling portion is formed of a bent plate. The vehicle wheel according to claim 1,
The auxiliary air chamber member is formed integrally with two Helmholtz resonators in the circumferential direction of the wheel with a partition wall as a boundary,
The vehicle wheel according to claim 1, wherein the communication hole is formed inside a tubular body formed at each of both end portions of the auxiliary air chamber member in the wheel circumferential direction.

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